Tamiflu (oseltamivir phosphate) is an antiviral drug approved for treatment of uncomplicated influenza A and B in patients 1 year of age or older. It is also approved for prophylaxis (prevention) of influenza in people 13 years or older after household contact or at high risk for exposure during influenza season. Tamiflu is one of a group of anti-influenza drugs called neuraminidase inhibitors that act by blocking the viral enzyme neuraminidase which helps the influenza virus invade cells in the respiratory tract.
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